Thread-cutting shuttle.



T. J. GARSIU.

THREAD GUTTING SHUTTLE.

APPLICATION FILED 0GT.2G,1909.

Patented Dec. 20, 1910.

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THEODORE ZI. GARISIO, OF ALLENT-OWN, PENNSYLVANIA.

THREAD-CUTTING SHUTTLE.

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Application filed October 26, 1909. Serial No. 524,652.

To all 'whom it may concern:

Be it known that I, Trinononn J. GARISIO, a citizen of the United States, and a resident of Allentown, in the county of Lehigh and State of Pennsylvania, have invented a new and Improved Thread-Cutting Shuttle, of

which the following is a full, clear, and exact description.

My invention relates to shuttles, my more particular purpose being to provide the same with means for cutting a filling thread by a positive chopping motion, this motion being controllable by the tension of the filling thread and independent of the ejection of the filling carrier from the shuttle.

More particularly stated, I seek to mount directly upon the shuttle a cutting mechanism which is actuated by the tension of the filling thread, and so arranged as to sever this thread whenever the tension of the latter exceeds a. predetermined limit.

AsA is well known in this art, 'a' filling thread may do considerable damage by becoming tight, as, for instance, if it fails to feed properly from the filling carrier. In suchinstances the excessive tension upon the filling thread may cause the stock to be warped and misshapen, and in some instances may cause the breakage of innumerable warp threads, thereby necessitating considerable time and patience in order to restore the mechanism back into its normal condition. It happens that a filling thread .should nearly always have considerable strength. Exceptfor this fact the severance of the filling thread would be an easy matter, as it might be depended upon to break as soon as the tension upon it became sufficient to threaten any damage to the cloth.

being woven. Since, however, the filling thread must be very strong and is usually of comparatively large size, it is not easily broken even when the tension upon it becomes dangerous to the stock. That I seek to do, therefore, is to so provide the shuttle with the aforesaid cutting mechanism and to so connect this mechanism with the filling thread, that whenever the tension upon the filling thread exceeds a predetermined limit the filling thread is cut and this, while dependent upon tlie tension of the filling thread, is accomplished with .considerably less eort than would ordinarily be associated with the severance of the filling thread. That is to say, with my device the filling thread is cut by aid of considerably ,less effort than would be necessary to cause the filling thread to break.

Reference is to be had to the accompanying drawings forming a part of this specifi cation, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a substantially vertical longitudinal section, through my improved shuttle, showing the filling carrier or bobbin, and

also showing in part my improved cutting i mechanism; Fig. 2 is a. plan view of the mechanism appearing in Fig. l; Fig. 3 is an enlarged side elevation of the fixed blade and the slide co-acting therewith and controllable by tension of the thread for forc ing the thread against said fixed blade-the blade and slide being mounted within and carried by the shuttle; Fig. 4 is a detail showing the slide and parts immediately associated therewith as the same would appear when seen from a point at the left of Fig. 3;

and Fig. 5 is a detail showing the slide and parts immediately associated therewith as the same would appear if seen from a point at the right of Fig. 3.

The shuttle is shown at 6 and is provided with an opening 7 in which is placed a filling carrier -9 having a filling thread 8 wound upon it so as to form a bobbin. The shuttle is further provided with a slot 10, merging into the opening 7 for facilitating-.the lodging of the shuttle and the removal therefrom of the filling carrier. -At 1l is a bearing provided with spring arms 12 each having generally a C shape, these arms being sprung into the shuttle for the purpose of holding the bearing 11. A leaf spring 12a is mounted within i the shuttle, and presses against the bearing 11 so as to hold the same in position with a proper degree of firmness. The opening 7 is partially bounded by a partition 13, having a substantiallyconical hole 14 extending through it. This hole merges into a slot 15 having a shallow portion 16. Mounted within the slot 15 are springs 17, and engaging the latter are pressure plates 18, which are forced toward each other automatically by the action of the spring.

A casing 19 is by aid of screws 20, 21

Asecured within the shallow portion 16 .of the slot 15. The casing'19 extends back-v wardly a little'distance toward the pressure plates 18 and is provided with two parallel fiat portions 22. Sandwiched between these two portions is a, blade 23 held firmly in position by aid oir rivets 24. A spiral spring 25 is mounted within the casing if), this casing` having a portion 2:5 especially adapted to Jfacilitate this object, as will be understood from Fig. 3.

rlfhe casing1 19 is provided with a pair ot longitudinal slots 26. A slide 27 made of spring metal is mounted within the casing d has generally the :torni indicated in lihgs. 3, Ll and its will be seen from these tlg-ares, the slide is provided with two eyes 2d and with longitudinal portions 29 havingl ends BO turned outwardly so as to tit neatly into the slots Q6. The portion. Q5 o'l' the casing is provided with a surface 3l, which serves as a limiting stop for the slide 27, so as to preventthe Same from traveling too tar to the left according to Fig. 8. rThe spiral spring 25 engages the outwardly turned ends 30 of the slide, and tends to torce the slide to the left according to Fig. 3, so that the slide normally occupies the position indicated in this gure, it is shown the fillingthread which, as above indicated, is wound upon the illing carrier 9. A portion 39. ot the filling thread is iorced in between the pressure plates 18 and the latter, 'actuated by the springs 17, exert upon this portion ot the thread a gentle rassure, thereby preventing the thread from being removed too rapidly. The portion 32a of the filling thread is carried forward, and passed through the two eyes 28.

At 33, 34, 35 are eyelets which serve as bearings for discharging the filling thread. ln the present instance the portion 32 of the filling' thread is extended through the eyelet 35, but in some instances it is de sir-able to pass the thread backwardly and outward through either of the eyelets 33, 34C, desired. This is sometimes done Jrior the purpose of enabling the thread to be paid 4out from a point 4nearer the center of the' shuttle. l

The operation of my device is as follows: rlhe shuttle is first loaded by placing in it the bobbinwthat is, the lilling carrier with the lilling; thread wound upon 1t. A portion of this thread bein extended between the pressure plates 18, t rough 'the eyes 28, and out through the eyelet 35, the shuttle is placed in the loom or analogous machine, and the outer or free end of the illmg thread is connected up ready for work. The machine being now in motion, the filling v thread lis paid out each time the shuttle is thrown, in the' manner well understood' in this art. ySuppose, now, that the lling thread 32 does not leave the bobbin with sutlicient freedom. This may happen, for

`instance, if the thread is tangled upon the to the presence oit a knot bobbin, or owin The reor stray niece o. waste or the like.

erases sult is that sooner or later there is an undue tension placed upon the filling thread. As?

the thread extends through the eyes 2S, this undue tension moves the slide ZY relatively to the casing i9 and blade That is to say, the spring` is compressed and the slide as a whole moves to the right according to Fig. The thread is thus pushed quickly and positively, in a direction lateral to its general length, directly against the blade LS. The thread is thus severed and no damage can ensue to the stop. lf desired,. the filling thread .may control a stop motion for automatically bringing;` to rest the shuttle and parts associated therewith. This i'eature beingV old, forms no part ot my present invention. I

l have found from experience, that by aid of the .mechanism above described the cutting ot the thread may beaccon'iplished with comparatively little longitudinal strain upon the thread, the principle being that a thread under tension may, by aid ot a sharp knife, be cut by aid of considerably less pressure or tension than would be necessary to break the 4thread by so--called main strength. l have also found, that by a quick severance of the thread the stock is not only protected as above described, but also that immediately prior to the severance of the filling thread very little damage is apt to accrue in consequence oft' any undue tension upon this thread. In other words, the cut is made so quickly and positively whenever the undue tension appears, that in the interim after the appearance of the undue tension and before the severance of the thread, very little weaving can be done by the maychine and no puchering or warping of the cloth being woven is at all likely to take place.

Vlhile for the salie of convenience I show one form of the invention, I do not limit myself thereto, as various constructional changes may be made therein without departing from the spirit of my invention.

Having thusv described my invention, I

claim as new and desire to secure -by Letters Patent: l. The combination of a shuttle, a bobbin mounted thereupon for carrying a thread, a blade carried by said shuttle, and mecha nism controllable by the tension of said thread fpr forcing said thread against said blade. y

2. Thecombination of a shuttle, a blade fixed relatively thereto, and a slide mounted upon said shuttle and movable relatively to said blade, said slide being provided with an eye through which said thread extends in order to enable the tension of said thread to actuate said slide. Y

3. The combination of a shuttle, a bobbin carried thereby and adapted to hold a thread to be paid out by said shuttle, mechanism same from being paid out too easily from' said shuttle, a blade carried by said shuttle,

and means controllable by the tension of.

said thread as paid out7 for forcingl said thread against said blade.

l. The combination of a shuttle provided With a slot, a bobbin carried by said shuttle and adapted to carry a filling thread, a slide mounted Within said slot and movable relatively to said shuttle, a member for inclosing said slide, said member being fixed relatively to said shuttle, a spring connected with said slide and with said'member inelosing the same, for the purpose of normally maintaining said slide in a predetermined position relatively to said shuttle, and a blade havinga tixed position relatively to said shuttle, said blade being disposed adjacent to the path of travel of said slide relatively to said shuttle, said lling thread eX- tending through said slide at a point adjacent to said blade in order to move said slide toivard said blade and thereby cut said illing thread.

The Combination of a shuttle, a bobbin carried thereby for supplying a filling thread, a slide mounted upon said shuttle and movable relatively to the same, a spring for normally holdirre; said slide in a predetermined position relatively to said shuttle, and means controllable by the tension of said filling thread tor moving said slide relatively to said blade in order to eut said thread.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

THEODORE GARISIO. 

